package com.sky.controller.user;

import com.sky.constant.StatusConstant;
import com.sky.entity.Dish;
import com.sky.result.Result;
import com.sky.service.DishService;
import com.sky.vo.DishVO;
import io.swagger.annotations.Api;
import io.swagger.annotations.ApiOperation;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.RedisTemplate;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;
import java.util.List;
import java.util.Set;

@RestController("userDishController")
@RequestMapping("/user/dish")
@Slf4j
@Api(tags = "C端-菜品浏览接口")
public class DishController {
    @Autowired
    private DishService dishService;
    @Autowired
    private RedisTemplate redisTemplate;

    /**
     * 根据分类id查询菜品
     *
     * @param categoryId
     * @return
     */
    @GetMapping("/list")
    @ApiOperation("根据分类id查询菜品")
    public Result<List<DishVO>> list(Long categoryId) {
        // 使用redis缓存缓存菜品极少数据库压力
        log.info("根据分类id查询菜品:{}", categoryId);
        // 1.构造redis缓存key，规则为dish_分类id
        String key="dish_"+categoryId;
        // 2.查询redis中是否有缓存数据
        List<DishVO> list = (List<DishVO>) redisTemplate.opsForValue().get(key);

        // 3.如果缓存中有数据，直接返回，无需查询数据库
        if (list != null&&list.size()>0) {
            return Result.success(list);
        }
        // 4.如果缓存中没有数据，查询数据库，将查询到的数据缓存到redis中

        Dish dish = new Dish();
        dish.setCategoryId(categoryId);
        dish.setStatus(StatusConstant.ENABLE);//查询起售中的菜品
        list = dishService.listWithFlavor(dish);
        // 缓存到redis中
        redisTemplate.opsForValue().set(key,list);


        return Result.success(list);
    }



}
